DreamWorks has set Jamie Foxx and Usher to join Beyonce in “Dreamgirls,” the Bill Condon-directed adaptation of the stage musical. The studio is circling Eddie Murphy to play singer James “Thunder” Early for the film, which begins production in January in Los Angeles. Foxx will get to test his vocal chops in the role of Curtis Taylor Jr., the Svengali-like manager who leads female singing group the Dreamettes to stardom as the Dreams. The musical was the thinly veiled story of the Supremes, and the model for Taylor was Berry Gordy. Usher will play choreographer C.C. White.